diff options
Diffstat (limited to 'libmudflap/mf-heuristics.c')
| -rw-r--r-- | libmudflap/mf-heuristics.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/libmudflap/mf-heuristics.c b/libmudflap/mf-heuristics.c index 5231a08253a..df2a0391eaf 100644 --- a/libmudflap/mf-heuristics.c +++ b/libmudflap/mf-heuristics.c @@ -4,7 +4,7 @@ and Graydon Hoare <graydon@redhat.com> This file is part of GCC. - + GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later @@ -46,10 +46,10 @@ extern char _end; extern char _start; -/* Run some quick validation of the given region. +/* Run some quick validation of the given region. Return -1 / 0 / 1 if the access known-invalid, possibly-valid, or known-valid. */ -int +int __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high) { VERBOSE_TRACE ("mf: heuristic check\n"); @@ -72,7 +72,7 @@ __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high) uintptr_t stack_segment_base = 0; #endif - VERBOSE_TRACE ("mf: stack estimated as %p-%p\n", + VERBOSE_TRACE ("mf: stack estimated as %p-%p\n", (void *) stack_top_guess, (void *) stack_segment_base); if (ptr_high <= stack_segment_base && @@ -80,7 +80,7 @@ __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high) ptr_high >= ptr) { return 1; - } + } } #endif @@ -118,13 +118,13 @@ __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high) if (! deja_vu) { /* Time to run the heuristic. Rescan /proc/self/maps; update the - entry[] array; XXX: remove expired entries, add new ones. + entry[] array; XXX: remove expired entries, add new ones. XXX: Consider entries that have grown (e.g., stack). */ char buf[512]; char flags[4]; void *low, *high; FILE *fp; - + fp = fopen ("/proc/self/maps", "r"); if (fp) { @@ -145,17 +145,17 @@ __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high) break; } } - + VERBOSE_TRACE ("mf: registering region #%d " "%p-%p given %s", i, (void *) low, (void *) high, buf); - + __mfu_register ((void *) low, (size_t) (high-low), - __MF_TYPE_GUESS, + __MF_TYPE_GUESS, "/proc/self/maps segment"); - + return 0; /* undecided (tending to cachable) */ - } + } } } fclose (fp); |